Copolymers of pivalolactone and isoprene or butadiene

Details Copolymers of pivalolactone and isoprene or butadiene Copolymers of pivalolactone and isoprene or butadiene

1975-06-25

1977-07-05

Ziegler, J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260879, 428524, C08L 900, C08L 1300

Patent

active

040340210

ABSTRACT:
Disclosed herein are new, specifically modified, copolymers of pivalolactone with isoprene and/or butadiene. Also disclosed is a process for making copolymers comprising (1) polymerizing the diene with a lithium initiator and, optionally, metallating the resulting lithiopolydiene with an alkyllithium, (2) carboxylating the resulting polylithiopolydiene by reaction with carbon dioxide, (3) reacting the polymeric lithium carboxylate with tetraalkylammonium hydroxide or halide and (4) reacting the tetraalkylammonium salt with pivalolactone.

REFERENCES:
patent: 3135716 (1964-06-01), Uraneck et al.
patent: 3418393 (1968-12-01), King
patent: 3557255 (1971-01-01), Sharkey
patent: 3907933 (1975-09-01), Foss

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